PDF malware analysis — malicious · 7e3b8673cb40b38d

MALICIOUS

PDF

11.8 KB

MD5: 1fd795785526c32940e90a073a4a3a89 SHA-1: 25b913af4b51030e3d90cac85a79134da7d3244a SHA-256: 7e3b8673cb40b38d2ca921836ea1657892ea4823e4e5e338ff19d75659793f0f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known PDF vulnerability using JavaScript. The embedded JavaScript streams, identified as legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for the malicious execution. ClamAV also detected this as Pdf.Exploit.Agent-36065, reinforcing the malicious nature.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `fb0f4c84f5deca3fdac65373c678e0e90c60101125ca3fc70bbbd99b6c8ca25c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12146 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5d5316922c7d03c584c7d483ab275c5b6e0ee5c22f64e4529b0a86bbb49d1397`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4991 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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